春季JPA數據庫掃描存儲庫不起作用

Question

看來我已禁用jpa存儲庫。有這樣的錯誤：

SEVERE: StandardWrapper.Throwable org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController' defined in file [C:\Users\jasiu\workspace2.metadata.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\BuyMyTime\WEB-INF\classes\web\UserController.class]: Unsatisfied dependency expressed through constructor parameter 0: No qualifying bean of type [data.UserRepository] found for dependency [data.UserRepository]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [data.UserRepository] found for dependency [data.UserRepository]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {} at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)

配置：

@Configuration 
@EnableTransactionManagement 
@EnableJpaRepositories(basePackages={"data"}) 
@ComponentScan(basePackages={"data"}, 
excludeFilters={ 
    @Filter(type=FilterType.ANNOTATION, value = EnableWebMvc.class) 
}) 
public class RootConfig { 

@Bean 
public JpaTransactionManager transactionManager(EntityManagerFactory emf, DataSource dataSource){ 
    JpaTransactionManager transactionManager = new JpaTransactionManager(); 
    transactionManager.setEntityManagerFactory(emf); 
    transactionManager.setDataSource(dataSource); 
    return transactionManager; 
} 

@Bean 
public DataSource dataSource() { 
    DriverManagerDataSource dataSource = new DriverManagerDataSource(); 
    dataSource.setDriverClassName("com.mysql.jdbc.Driver"); 
    dataSource.setUrl("jdbc:mysql://localhost:3306/HelloWorld"); 
    dataSource.setUsername("login"); 
    dataSource.setPassword("haslo"); 
    return dataSource; 
} 

@Bean 
public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, JpaVendorAdapter jpaVendorAdapter) { 
    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean(); 
    em.setDataSource(dataSource); 
    em.setPackagesToScan("data"); 
    em.setJpaVendorAdapter(jpaVendorAdapter); 
    em.setJpaProperties(additionalProperties()); 
    return em; 
} 

Properties additionalProperties() { 
    Properties properties = new Properties(); 
    //properties.setProperty("hibernate.hbm2ddl.auto", "create-drop"); 
    properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect"); 
    return properties; 
} 

@Bean 
public JpaVendorAdapter jpaVendorAdapter(){ 
    HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter(); 
    //adapter.setDatabase(); 
    adapter.setShowSql(true); 
    adapter.setGenerateDdl(false); 
    adapter.setDatabasePlatform("org.hibernate.dialect.HSQLDialect"); 
    return adapter; 
} 

} 

回購是包 「數據」：

@Repository 
@Transactional 
public interface UserRepository extends JpaRepository<User, Long>{ 
    User findByNick(String nick); 
} 

控制器：

@Controller 
public class UserController { 

@Autowired 
protected UserRepository userRepository; 
... 
} 

的pom.xml：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>com.app</groupId> 
    <artifactId>BuyMyTime</artifactId> 
    <packaging>war</packaging> 
    <version>0.0.1-SNAPSHOT</version> 
    <name>BuyMyTime Maven Webapp</name> 
    <url>http://maven.apache.org</url> 
    <properties> 
     <spring.version>4.3.1.RELEASE</spring.version> 
    </properties> 
    <dependencies> 
    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-entitymanager</artifactId> 
     <version>4.3.1.Final</version> 
    </dependency> 
    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-core</artifactId> 
     <version>5.1.0.Final</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.data</groupId> 
     <artifactId>spring-data-jpa</artifactId> 
     <version>1.10.2.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-orm</artifactId> 
     <version>4.2.3.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>javax.persistence</groupId> 
     <artifactId>persistence-api</artifactId> 
     <version>1.0</version> 
    </dependency> 
    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-validator</artifactId> 
     <version>5.0.1.Final</version> 
    </dependency> 
    <dependency> 
     <groupId>javax.validation</groupId> 
     <artifactId>validation-api</artifactId> 
     <version>1.1.0.Final</version> 
    </dependency> 
    <dependency> 
     <groupId>commons-fileupload</groupId> 
     <artifactId>commons-fileupload</artifactId> 
     <version>1.3.1</version> 
    </dependency> 
    <dependency> 
     <groupId>org.thymeleaf</groupId> 
     <artifactId>thymeleaf-spring4</artifactId> 
     <version>3.0.0.ALPHA03</version> 
    </dependency> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>3.8.1</version> 
     <scope>test</scope> 
    </dependency> 
    <!-- Spring dependencies --> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-core</artifactId> 
      <version>${spring.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-web</artifactId> 
      <version>${spring.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-webmvc</artifactId> 
      <version>${spring.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-context</artifactId> 
      <version>${spring.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-beans</artifactId> 
      <version>${spring.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework</groupId> 
      <artifactId>spring-aop</artifactId> 
      <version>${spring.version}</version> 
     </dependency> 
    </dependencies> 
    <build> 
    <finalName>BuyMyTime</finalName> 
    </build> 
</project> 

請任何幫助。

Answer 1

什麼是你的項目結構？我使用Basepackage.data將用戶代碼複製到一個項目中，並發現了存儲庫。

我想這是因爲你的默認包下的配置和數據的孩子。我通過將數據，Web和配置包移動到一個通用包中來實現它。

這裏是我的配置註釋

package basepackage.config; 

@Configuration 
@EnableAutoConfiguration 
@EnableJpaRepositories(basePackages={"basepackage.data"}) 
@EntityScan(basePackageClasses=User.class) 
@ComponentScan(basePackages={"basepackage"}) 
public class MyConfig { 

@Autowired 
private UserRepository repo; 

@PostConstruct 
public void init(){ 
    for(int i=0; i<10; i++){ 
     repo.save(new User("u-"+i)); 
    } 

} 

} 

您也可以通過使用basePackageClasses定義掃描。

@Configuration 
@EnableAutoConfiguration 
@EnableJpaRepositories(basePackageClasses={UserRepository.class}) 
@EntityScan(basePackageClasses=User.class) 
@ComponentScan(basePackages={"basepackage"}) 

希望有所幫助。